ashrithr

# From a fresh install of squeeze
apt-get install ruby rubygems # Need ruby to use fpm
gem1.8 install fpm --no-ri --no-rdoc

apt-get install build-essential openssl libreadline6 libreadline6-dev zlib1g zlib1g-dev libssl-dev ncurses-dev libyaml-dev

wget ftp://ftp.ruby-lang.org/pub/ruby/1.9/ruby-1.9.3-p125.tar.gz
tar -zxvf ruby-1.9.3-p125.tar.gz
cd ruby-1.9.3-p125
rm -rf /tmp/ruby193

ashrithr

Producer

Setup
bin/kafka-topics.sh --zookeeper esv4-hcl197.grid.linkedin.com:2181 --create --topic test-rep-one --partitions 6 --replication-factor 1
bin/kafka-topics.sh --zookeeper esv4-hcl197.grid.linkedin.com:2181 --create --topic test --partitions 6 --replication-factor 3

Single thread, no replication

bin/kafka-run-class.sh org.apache.kafka.clients.tools.ProducerPerformance test7 50000000 100 -1 acks=1 bootstrap.servers=esv4-hcl198.grid.linkedin.com:9092 buffer.memory=67108864 batch.size=8196

ashrithr

#!/bin/sh

# Some things taken from here
# https://github.com/mathiasbynens/dotfiles/blob/master/.osx

# Set the colours you can use
black='\033[0;30m'
white='\033[0;37m'
red='\033[0;31m'
green='\033[0;32m'

ashrithr

Step 0:

Get Homebrew installed on your mac if you don't already have it

Step 1:

Install highlight. "brew install highlight". (This brings down Lua and Boost as well)

Step 2:

ashrithr

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

ashrithr

#! /bin/bash

GCC_VERSION="5.2.0"
WORKDIR="$HOME/src/"
INSTALLDIR="/platform"

## NOTE: XCode must be installed (through App Store) and the following run to install command-line tools.
## THIS IS IMPORTANT! Among other things, it creates '/usr/include' and installs the system header files.
# xcode-select --install

ashrithr

# 2k was used as warmup

Projects used:

https://github.com/schmitch/performance

Hardware Client: MacBook Pro 11,3 - Intel(R) Core(TM) i7-4850HQ CPU @ 2.30GHz with a Broadcom NetXtreme Gigabit Ethernet Controller
Network Switch: Consumer grade 5 Port
Hardware Server: Intel(R) Xeon(R) CPU E5-2670 0 @ 2.60GHz (HT enabled)

ashrithr

Instructions

1. Install Karabiner Elements
2. Open your karabiner.json file (it will be in ~/.config/karabiner/karabiner.json).
3. Find complex_modifications. It will have a key rules that takes a list ("rules": [...]).
4. Inside the square brackets, paste this:

{
    "description": "Change Caps Lock + I/J/K/L to Arrow Keys",

ashrithr

#!/bin/sh
# Darkify Slack on Mac OS or Linux.

# curl https://gist.githubusercontent.com/ryanpcmcquen/8a7ddc72460eca0dc1f2dc389674dde1/raw/darkify_slack.sh | sh

if [ "`uname -s`" = "Darwin" ]; then
    SLACK_INTEROP_JS="/Applications/Slack.app/Contents/Resources/app.asar.unpacked/src/static/ssb-interop.js"
else
    SLACK_INTEROP_JS="/usr/lib/slack/resources/app.asar.unpacked/src/static/ssb-interop.js"
fi